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35 datasets

Surface Water - Freshwater Harmful Algal Blooms

Published by: California State Water Resources Control Board
Last updated: Saturday, April 4, 2026
File types: PDF, CSV

Freshwater harmful algal bloom (HAB) data from the Freshwater Harmful Algal Bloom (FHAB) data system. The FHAB data system is the California State Wat...

National Hydrography Data - NHD and 3DHP

Published by: California Department of Water Resources
Last updated: Monday, April 6, 2026
File types: PDF, ZIP, WEBSITE, ARCGIS GEOSERVICES REST API, CSV, WEB VIDEOS

The USGS National Hydrography Dataset (NHD) downloadable data collection from The National Map (TNM) is a comprehensive set of digital spatial data th...

Active Transportation Count Dataset

Published by: Caltrans
Last updated: Wednesday, February 18, 2026
File types: PDF, XLSX, CSV

The Pedestrian and Bicycle Count Dataset documents non motorized traffic on state highways, originating from Caltrans district pilots initiated in 202...

CalEnviroScreen 2.0

Published by: California Office of Environmental Health Hazard Assessment
Last updated: Wednesday, October 23, 2019
File types: CSV, XLSX, PDF

The Office of Environmental Health Hazard Assessment (OEHHA), on behalf of the California Environmental Protection Agency (CalEPA), developed Californ...

CalEnviroScreen 3.0 Results

Published by: California Office of Environmental Health Hazard Assessment
Last updated: Wednesday, October 23, 2019
File types: PDF, CSV, SHP

CalEnviroScreen is a mapping tool that helps identify California communities that are most affected by many sources of pollution, and where people are...